Switzerland is sweltering under the summer heat—but how much water does your body really need right now? With a simple formula, you can calculate your daily fluid intake in just a few seconds.

—It’s an established fact that consumption of water on a regular basis is good for overall health. But what are the benefits of water intake with regard to specific medical conditions? A new ...

From hot weather to workouts, here's how to work out your hydration needs this summer ...